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B. anthracis phage morphologies and isolation. (A and B) Transmission electron micrographs of γ phage virions showing its isometric head and long noncontractile tail. (C and D) Single colonies of B. cereus ATCC 11950 grown for 16 h on BHI agar plates with and without 20 μg ml−1 fosfomycin, respectively. The central holes in panel C are enriched for the Wβ phage. (E) A single intact Wβ phage virion. All scale bars represent 50 nm.
